/*
 *
 * (c) Copyright Ascensio System Limited 2010-2023
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
*/


namespace System
{
    public static class TimeZoneExtension
    {
        /// <summary>
        /// Get utc offset
        /// </summary>
        /// <param name="timeZone">timeZone</param>
        /// <param name="baseOffset">return BaseUtcOffset</param>
        /// <param name="dateTime">return GetUtcOffset(dateTime ?? DateTime.UtcNow)</param>
        /// <returns></returns>
        public static TimeSpan GetOffset(this TimeZoneInfo timeZone, bool baseOffset = false, DateTime dateTime = default(DateTime))
        {
            if (baseOffset)
                return timeZone.BaseUtcOffset;

            return timeZone.GetUtcOffset(dateTime == default(DateTime) ? DateTime.UtcNow : dateTime);
        }
    }
}
